Loss Reclassified From AOCI for Commodity Contracts (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 13, 2019	Jul. 14, 2018	Jul. 13, 2019	Jul. 14, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Net of tax		$ (945)	$ 126	$ (3,123)	$ 423
Cash Flow Hedge Items
Accumulated Other Comprehensive Income Loss [Line Items]
Gross (gain) loss reclassified from AOCI into income	[1]	(1,265)	168	(4,178)	565
Tax (benefit) expense	[1]	320	(42)	1,055	(142)
Net of tax	[1]	(945)	126	(3,123)	423
Commodity Contract | Cash Flow Hedge Items
Accumulated Other Comprehensive Income Loss [Line Items]
Gross (gain) loss reclassified from AOCI into income	[1],[2]	$ (1,298)	$ 135	(4,255)	488
Tax (benefit) expense				1,074	(123)
Net of tax				$ (3,181)	$ 365

[1] Amounts in parentheses indicate debits to determine net income.

[2] Amounts are presented as an adjustment to reconcile net income to net cash provided by operating activities on the     Condensed Consolidated Statements of Cash Flows.